package com.wpw.dream.lock;

import java.util.concurrent.locks.AbstractQueuedSynchronizer;

public class MySharedDemo {

}

class ShardQueuedSynchronizer extends AbstractQueuedSynchronizer {

	@Override
	protected int tryAcquireShared(int arg) {
		return super.tryAcquireShared(arg);
	}
	
	
	
}
